Switch device



(No Model.)

H. M. DOAK, Jr. SWITCH DEVICE.

No. 586,478. Patented July 13, 1897.

HENRY MELVILLE DOAK, JR.,

SWITCH PATENT OFFICE.

OF NASHVILLE, TENNESSEE.

DEVICE.

SPECIFICATION forming part of Letters Patent No. 586,478, dated July 13, 1897.

Application tiled March 23, 1897.

To @ZZ whom it may concern,.-

Be it known that l, HENRY MELVILLE DOAK, Jr., residing at N ashville,in the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Switch Devices, of which the following is a specification.

The object of my invention is to provide means for throwing the tongue-switch of a street-railway in either direction by a device located on the car operated by the motorman, who is thus able to open or close the switch at will, so that the car will take the straight or curved track, as desired.

The features of myinvention are more fully set forth in the description of the accompanying drawings, making a part of this specification, in which- Figure l is a side elevation, partly in section, of my improvement. Eig. 2 is a top plan view of the switching-levers in position for guiding the car on a curved track. Fig. 3 is a similar view showing the position of the levers when the straight track is open. Fig. 4 is a cross-section on line a; Fig. 3. Fig.

5 is a cross-section on line g/ 11], Eig. 3.

A represents the main rails.

I3 represents the curved or side rails.

C represents the tongue-switch.

D represents the grooved or channel way between the rails.

E represents a bell-crank lever which is shown of quadrant form.

a represents a connecting-rod hinged to the bell-crank or quadrant lever at one end and to the bolt h, projecting downward from'the under side of the switch-tongue, as shown in Fig. 5.

F represents a connecting-rod hinged to the bell-crank lever at one end and to the trip-lever G at the opposite end. Said triplever is hinged to a center d and oscillates thereon. The free end of said lever G projects int-o the groove of the channel-way D, which is slotted to receive the same.

In Fig. 3 the end of lever G is shown athwart the channel-way n. In Fig. 2 it is shown as having been moved out of the same by the operation of the switch-hook.

Il represents a connecting-rod pivoted to the lever G at c, and the opposite end is pivoted to trip-lever I, which journals on the Serial No. 628,895. (No model.)

center g. The free end of this lever I is shown in Fig. 2 as projecting through a slot formed in the side of the channel-way.

K represents a switch-hook attached to the under side of the car by a hinge t'. e represents a spring for holding the same normally upward out of the channel-way, over which this lever is suspended in a vertical plane.

h represents a push-rod projecting up through the platform of the car and within easy reach of the foot of the operator.

Mode of operation: Suppose the levers to be set in the position shown in Fig. 2. In this position the curve or side track Bis open, the tongue C lying up against the main rail. If the operator wishes to close the siding and open the main rail, he depresses the pushrod. The switch-hook K will drop into the channel-way D and will engage with the tripping-lever I and move it around on its center g. Levers II G F E and tongue-switch C will be moved into the position shown in Fig. 3, which closes the siding and opens the main track.A If the operator instantlyT releases the switch-hook as soon as this setting has occurred, it will rise up and not come in contact with lever G; but should he wish to reset the switch to its original position he will continue to depress the switch-hook K, when it will engage with the lever G and throw the tongue-switch into the position shown in Fig. 2. Thus either one or both of the levers I and G may be tripped to throw the switch, as desired.

It will be observed that the trip-levers for each respective movement of the tongueswitch are in opposite positions-,one in the channel-way and the other out of it-and that the switch may be moved in either direction by the operator, and this is accomplished by means of two set-s of trip-levers, one connected directly to and operating the other, and I believe I am the first to accomplish this result.

I-Iaving described my invention, what I claim isl. The combination with the tongue-switch C of a railway, of a bell-crank lever E hinged thereto by a connecting-rod, a channeled way arranged midway between the rails, trippinglevers G and I arranged to alternately project at their free ends across said channeled IOC free ends across the channel of saidwvay, a

connecting-rod H pivotally connected at its x5 ends to opposite ends of the trippinglevers\,` and a connecting-rod F connecting the tripping-lever G to the bell-crank lever, substantially as described.

In testimony whereof I have hereunto set 2c my hand.

HENRY MELVILLE DOAK, JR.

Vitn esses:

HAMILTON PARKS, WM. S. GRANBURY. 

